Cleanup invalid comments (duplication of words)

https://bugzilla.gnome.org/show_bug.cgi?id=735301

Signed-off-by: Ikey Doherty <michael.i.doherty@intel.com>

docs/reference/gtk/building.sgml

@@ -102,7 +102,7 @@ How to compile GTK+ itself
       is used in a similar fashion for the linker. Finally the
       <envar>PKG_CONFIG_PATH</envar> environment variable contains
       a search path that <command>pkg-config</command> (see below)
-      uses when looking for for file describing how to compile
+      uses when looking for files describing how to compile
       programs using different libraries. If you were installing GTK+
       and it's dependencies into <filename>/opt/gtk</filename>, you
       might want to set these variables as:

gdk/broadway/broadway.js

@@ -2401,7 +2401,7 @@ function handleKeyPress(e) {
 
     keysym = getKeysym(ev);
 
-    // Modify the the which attribute in the depressed keys list so
+    // Modify the which attribute in the depressed keys list so
     // that the keyUp event will be able to have the character code
     // translation available.
     if (kdlen > 0) {

gdk/gdkwindow.c

@@ -408,7 +408,7 @@ gdk_window_class_init (GdkWindowClass *klass)
    * @height: the height of the offscreen surface to create
    *
    * The ::create-surface signal is emitted when an offscreen window
-   * needs its surface (re)created, which happens either when the the
+   * needs its surface (re)created, which happens either when the
    * window is first drawn to, or when the window is being
    * resized. The first signal handler that returns a non-%NULL
    * surface will stop any further signal emission, and its surface

gtk/gtkgesturesingle.c

@@ -20,7 +20,7 @@
 
 /**
  * SECTION:gtkgesturesingle
- * @Short_description: Base class for for mouse/single-touch gestures
+ * @Short_description: Base class for mouse/single-touch gestures
  * @Title: GtkGestureSingle
  *
  * #GtkGestureSingle is a subclass of #GtkGesture, optimized (although